CN103686836A

CN103686836A - Switching control method and device in cognitive radio system

Info

Publication number: CN103686836A
Application number: CN201210349096.3A
Authority: CN
Inventors: 苗婷; 李岩; 刘星; 王斌; 任龙涛; 张媛媛
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2012-09-19
Filing date: 2012-09-19
Publication date: 2014-03-26
Anticipated expiration: 2032-09-19
Also published as: EP2887737A1; EP2887737A4; WO2014044116A1; US9655024B2; US20150230146A1; EP2887737B1; CN103686836B

Abstract

The invention discloses a switching control method and device in a cognitive radio system so as to control the channel switching process of user equipment and switch the user equipment to an appropriate target channel to the greatest extent. The method comprises the following steps: a source base station receives a measurement report sent by the user equipment (UE) and controls the switching of the user equipment according to the measurement report, radio resource management information and reconfiguration related information. The device is positioned in the source base station and comprises a receiving module and a switching control module. By the switching control method and the device in a cognitive radio system, disclosed by the invention, the user equipment can be switched to the appropriate target channel to the greatest extent so as to avoid switching failure caused by spectrum resource reconfiguration of the target channel during the UE switching process and problems of UE service interruption and frequent switching caused by spectrum resource reconfiguration of the target channel after the UE is switched to the target channel.

Description

Method for handover control in a kind of cognitive radio system and device

Technical field

The present invention relates to radio communication and cognitive radio technology field, be specifically related to method for handover control and device in a kind of cognitive radio system.

Background technology

Along with the continuous progress of radiotechnics, various radio traffic emerges in multitude, and the frequency spectrum resource that radio traffic is relied on is limited, and in the face of the continuous increase of people to bandwidth demand, frequency spectrum resource shows very nervous situation; And on the other hand under traditional fixed frequency spectrum allocation model, the utilance of frequency spectrum resource is but not high.Say in a sense, being this fixed allocation has caused the very nervous situation of frequency spectrum resource to the spectrum allocation may system of authoring system.And cognitive radio (CR, Cognitive Radio) technology has just been broken traditional frequency spectrum fixed allocation system, by frequency spectrum dynamic assignment between system, improved the utilization ratio of frequency spectrum.Research finds that radio data system frequency spectrum resource exists available space to a great extent, as some radio data system frequency spectrum is not used in certain areas; Though some radio data system frequency spectrum has covering in somewhere, some is not used constantly, and overall utilization rate is on the low side.And fixing spectrum allocation may mode cannot re-use the above-mentioned frequency spectrum resource not used, for example cannot be used for international mobile phone (IMT, International Mobile Telecom) system.And cognitive radio technology has solved this problem, by cognitive radio technology IMT system basis obtaining radio data system information, that waits for an opportunity takies Broadcast and TV system untapped frequency spectrum resource (TVWS on room and time, TV White Space), thereby improve the utilance of radio data system frequency spectrum (mandate frequency spectrum), improved the situation of IMT system spectrum anxiety.

Cognitive radio system can " wait for an opportunity " to use primary user's (television broadcasting system) there is no at special time and position the channel (being TVWS) using.Therefore, the operable TVWS frequency spectrum of cognitive radio system is constantly to change, for example, due to primary user's arrival (being that primary user resumes TVWS) or other reason, cognitive radio system must exit the TVWS frequency spectrum using, or reprovision (exits the TVWS frequency spectrum using to other TVWS frequency spectrum, and reconfigure other TVWS frequency spectrum), and reprovision time delay also may cause the interruption of subscriber equipment (UE, User Equipment) business.

Handoff technique is one of core technology of mobile communication system, and outstanding handoff algorithms can be for there being the user of handover call request that more efficient and more reliable handed over service is provided between two adjacent base stations, thereby system communication quality and power system capacity are provided.Before switching, the Serving cell of subscriber equipment is called cell-of-origin, and the base station under cell-of-origin is called source base station; The community (being to become the community of the Serving cell of subscriber equipment after handover success) that subscriber equipment is prepared to be switched to is called Target cell, and the base station under Target cell is target BS.

Conventionally, the switch decision technology that communication system (as long evolving system LTE) adopts is mainly that UE measures the signal strength signal intensity of cell-of-origin and adjacent cell and signal quality, and measurement result is reported to base station under cell-of-origin; Under cell-of-origin, base station judges whether to trigger according to the threshold value arranging and switches, and according to the measurement result select target community of UE; Prior art does not consider that in switching flow Target cell is the community of cognitive radio system situation when (as, the community of using TVWS frequency spectrum).When Target cell is the community of cognitive radio system when (as, the community of using TVWS frequency spectrum or other system authorization frequency spectrum), still adopt that switch determining method of the prior art can there are the following problems:

1, in UE handoff procedure, there is frequency spectrum resource reprovision in Target cell, for example by TVWS frequency spectrum f1 reprovision to f2, and UE do not know that change has occurred the frequency spectrum resource of Target cell now, cause UE cannot find definite Target cell before, thereby cause handoff failure, and, even if having known the frequency spectrum resource variation of Target cell, UE asks condition, but also invalid due to the variation of frequency to the measurement result of Target cell f1 frequency and handover decisions before this, that is to say that f2 might not be applicable to UE and switch, may cause handoff failure equally;

2, UE is switched to Target cell soon, and frequency spectrum resource reprovision occurs in Target cell, and UE is reprovision thereupon also, and the business of UE can be subject to the impact of reprovision time delay, if Target cell reprovision overlong time may cause UE service disconnection;

3, affiliated base station, cell-of-origin is when carrying out Target cell selection, do not consider the spectral properties of Target cell, concrete, do not consider whether Target cell is the community of using TVWS frequency spectrum community or using the mandate frequency spectrum of other wireless access technology communication system, but the use of default objects community is to authorize frequency spectrum; Because frequency spectrum resource reprovision situation may appear in TVWS frequency spectrum community, can cause the number of times that UE switches to increase.

Summary of the invention

The technical problem to be solved in the present invention is to provide method for handover control and the device in a kind of cognitive radio system, and the cell switch process of subscriber equipment is controlled, and can subscriber equipment be switched to suitable Target cell as far as possible.

For solving the problems of the technologies described above, the invention provides the method for handover control in a kind of cognitive radio system, comprising:

Source base station receives the measurement report that subscriber equipment sends;

Source base station carries out switching controls according to described measurement report, wireless resource management information and reprovision relevant information to described subscriber equipment.

Further, described source base station carries out switching controls according to described measurement report, wireless resource management information and reprovision relevant information to described subscriber equipment, comprising:

Described source base station is determined candidate target cells according to described measurement report, wireless resource management information, according to the reprovision relevant information of candidate target cells, described subscriber equipment is carried out to switching controls.

Further, described reprovision relevant information comprises one or more of following content: frequency spectrum effective time, reprovision time delay, average reprovision number of times; Wherein: described frequency spectrum refers to that current area starts to the time span that exits the moment of work at present frequency spectrum from current time effective time; Described reprovision time delay refers to that current area completes the time of reprovision process need; Described average reprovision number of times refers to the reprovision number of times in Preset Time section.

Further, the described reprovision relevant information according to candidate target cells is carried out switching controls to described subscriber equipment, comprising:

Whether the frequency spectrum that judges candidate target cells is greater than frequency spectrum threshold value effective time effective time, when the frequency spectrum of candidate target cells is greater than frequency spectrum threshold value effective time effective time, source base station is selected the Target cell of this candidate target cells for switching, target BS under this Target cell sends handover request message, the switching with completing user equipment to Target cell; Or

Whether the reprovision time delay that judges candidate target cells is less than the reprovision time delay threshold value that user apparatus service requires, when the reprovision time delay of candidate target cells is less than the reprovision time delay threshold value that user apparatus service requires, source base station is selected the Target cell of this candidate target cells for switching, target BS under this Target cell sends handover request message, the switching with completing user equipment to Target cell; Or

Whether the average reprovision number of times that judges candidate target cells is less than average reprovision frequency threshold value, when the average reprovision number of times of candidate target cells is less than average reprovision frequency threshold value, source base station is selected the Target cell of this candidate target cells for switching, target BS under this Target cell sends handover request message, the switching with completing user equipment to Target cell; Or

Whether the frequency spectrum that judges candidate target cells is greater than frequency spectrum threshold value effective time effective time, when the frequency spectrum of candidate target cells is greater than frequency spectrum threshold value effective time effective time, further judge whether the reprovision time delay of candidate target cells is less than the reprovision time delay threshold value that user apparatus service requires, when the reprovision time delay of candidate target cells is less than the reprovision time delay threshold value that user apparatus service requires, source base station is selected the Target cell of this candidate target cells for switching, target BS under this Target cell sends handover request message, switching with from completing user equipment to Target cell, or

Whether the frequency spectrum that judges candidate target cells is greater than frequency spectrum threshold value effective time effective time, when the frequency spectrum of candidate target cells is greater than frequency spectrum threshold value effective time effective time, further judge whether the average reprovision number of times of candidate target cells is less than average reprovision frequency threshold value, when the average reprovision number of times of candidate target cells is less than average reprovision frequency threshold value, source base station is selected the Target cell of this candidate target cells for switching, target BS under this Target cell sends handover request message, the switching with completing user equipment to Target cell; Or

Whether the reprovision time delay that judges candidate target cells is less than the reprovision time delay threshold value that user apparatus service requires, when the reprovision time delay of candidate target cells is less than the reprovision time delay threshold value that user apparatus service requires, further judge whether the average reprovision number of times of candidate target cells is less than average reprovision frequency threshold value, when the average reprovision number of times of candidate target cells is less than average reprovision frequency threshold value, source base station is selected the Target cell of this candidate target cells for switching, target BS under this Target cell sends handover request message, switching with from completing user equipment to Target cell, or

Whether the frequency spectrum that judges candidate target cells is greater than frequency spectrum threshold value effective time effective time, when the frequency spectrum of candidate target cells is greater than frequency spectrum threshold value effective time effective time, further judge whether the reprovision time delay of candidate target cells is less than the reprovision time delay threshold value that user apparatus service requires, when the reprovision time delay of candidate target cells is less than the reprovision time delay threshold value that user apparatus service requires, further judge whether the average reprovision number of times of candidate target cells is less than average reprovision frequency threshold value, when the average reprovision number of times of candidate target cells is less than average reprovision frequency threshold value, source base station is selected the Target cell of this candidate target cells for switching, target BS under this Target cell sends handover request message, switching with from completing user equipment to Target cell.

For solving the problems of the technologies described above, the present invention also provides the method for handover control in a kind of cognitive radio system, comprising:

Source base station is determined Target cell according to described measurement report, wireless resource management information, to target BS, sends handover request message;

Target BS is received after described handover request message, according to the reprovision relevant information of described Target cell, described subscriber equipment is carried out to switching controls.

Further, the described reprovision relevant information according to described Target cell is carried out switching controls to described subscriber equipment, comprising:

Whether the frequency spectrum that judges described Target cell is greater than frequency spectrum threshold value effective time effective time, when the frequency spectrum of described Target cell is greater than frequency spectrum threshold value effective time effective time, described subscriber equipment is received to control, the switching with completing user equipment to Target cell; Or

Whether the reprovision time delay that judges described Target cell is less than the reprovision time delay threshold value that user apparatus service requires, when the reprovision time delay of described Target cell is less than the reprovision time delay threshold value that user apparatus service requires, described subscriber equipment is received to control, the switching with completing user equipment to Target cell; Or

Whether the average reprovision number of times that judges described Target cell is less than average reprovision frequency threshold value, when the average reprovision number of times of described Target cell is less than average reprovision frequency threshold value, described subscriber equipment is received to control, the switching with completing user equipment to Target cell; Or

Whether the frequency spectrum that judges described Target cell is greater than frequency spectrum threshold value effective time effective time, when the frequency spectrum of described Target cell is greater than frequency spectrum threshold value effective time effective time, further judge whether the reprovision time delay of described Target cell is less than the reprovision time delay threshold value that user apparatus service requires, when the reprovision time delay of described Target cell is less than the reprovision time delay threshold value that user apparatus service requires, described subscriber equipment is received to control, the switching with completing user equipment to Target cell; Or

Whether the frequency spectrum that judges described Target cell is greater than frequency spectrum threshold value effective time effective time, when the frequency spectrum of described Target cell is greater than frequency spectrum threshold value effective time effective time, further judge whether the average reprovision number of times of described Target cell is less than average reprovision frequency threshold value, when the average reprovision number of times of described Target cell is less than average reprovision frequency threshold value, described subscriber equipment is received to control, the switching with completing user equipment to Target cell; Or

Whether the reprovision time delay that judges described Target cell is less than the reprovision time delay threshold value that user apparatus service requires, when the reprovision time delay of described Target cell is less than the reprovision time delay threshold value that user apparatus service requires, further judge whether the average reprovision number of times of described Target cell is less than average reprovision frequency threshold value, when the average reprovision number of times of described Target cell is less than average reprovision frequency threshold value, described subscriber equipment is received to control, the switching with completing user equipment to Target cell; Or

Whether the frequency spectrum that judges described Target cell is greater than frequency spectrum threshold value effective time effective time, when the frequency spectrum of described Target cell is greater than frequency spectrum threshold value effective time effective time, further judge whether the reprovision time delay of described Target cell is less than the reprovision time delay threshold value that user apparatus service requires, when the reprovision time delay of described Target cell is less than the reprovision time delay threshold value that user apparatus service requires, further judge whether the average reprovision number of times of described Target cell is less than average reprovision frequency threshold value, when the average reprovision number of times of described Target cell is less than average reprovision frequency threshold value, described subscriber equipment is received to control, switching with from completing user equipment to Target cell.

For solving the problems of the technologies described above, the present invention also provides the switching control in a kind of cognitive radio system, is positioned at source base station, comprises receiver module, switching controls module, wherein:

Described receiver module, the measurement report sending for receiving subscriber equipment;

Described switching controls module, for carrying out switching controls according to described measurement report, wireless resource management information and reprovision relevant information to described subscriber equipment.

Further, described switching controls module comprises candidate target cells determining unit and switch control unit, wherein:

Described candidate target cells determining unit, for determining candidate target cells according to described measurement report, wireless resource management information;

Described switch control unit, carries out switching controls for the reprovision relevant information according to candidate target cells to described subscriber equipment.

Further, described reprovision relevant information comprises one or more of following content: frequency spectrum effective time, reprovision time delay, average reprovision number of times; Wherein said frequency spectrum refers to that current area starts to the time span that exits the moment of work at present frequency spectrum from current time effective time; Described reprovision time delay refers to that current area completes the time of reprovision process need; Described average reprovision number of times refers to the reprovision number of times in Preset Time section.

Further, described switch control unit carries out switching controls according to the reprovision relevant information of candidate target cells to described subscriber equipment, comprising:

Described switch control unit judges whether the frequency spectrum of candidate target cells is greater than frequency spectrum threshold value effective time effective time, when the frequency spectrum of candidate target cells is greater than frequency spectrum threshold value effective time effective time, described switch control unit is selected the Target cell of this candidate target cells for switching, target BS under this Target cell sends handover request message, the switching with completing user equipment to Target cell; Or

Described switch control unit judges whether the reprovision time delay of candidate target cells is less than the reprovision time delay threshold value that user apparatus service requires, when the reprovision time delay of candidate target cells is less than the reprovision time delay threshold value that user apparatus service requires, described switch control unit is selected the Target cell of this candidate target cells for switching, target BS under this Target cell sends handover request message, the switching with completing user equipment to Target cell; Or

Described switch control unit judges whether the average reprovision number of times of candidate target cells is less than average reprovision frequency threshold value, when the average reprovision number of times of candidate target cells is less than average reprovision frequency threshold value, described switch control unit is selected the Target cell of this candidate target cells for switching, target BS under this Target cell sends handover request message, the switching with completing user equipment to Target cell; Or

Described switch control unit judges whether the frequency spectrum of candidate target cells is greater than frequency spectrum threshold value effective time effective time, when the frequency spectrum of candidate target cells is greater than frequency spectrum threshold value effective time effective time, further judge whether the reprovision time delay of candidate target cells is less than the reprovision time delay threshold value that user apparatus service requires, when the reprovision time delay of candidate target cells is less than the reprovision time delay threshold value that user apparatus service requires, described switch control unit is selected the Target cell of this candidate target cells for switching, target BS under this Target cell sends handover request message, switching with from completing user equipment to Target cell, or

Described switch control unit judges whether the frequency spectrum of candidate target cells is greater than frequency spectrum threshold value effective time effective time, when the frequency spectrum of candidate target cells is greater than frequency spectrum threshold value effective time effective time, further judge whether the average reprovision number of times of candidate target cells is less than average reprovision frequency threshold value, when the average reprovision number of times of candidate target cells is less than average reprovision frequency threshold value, described switch control unit is selected the Target cell of this candidate target cells for switching, target BS under this Target cell sends handover request message, switching with from completing user equipment to Target cell, or

Described switch control unit judges whether the reprovision time delay of candidate target cells is less than the reprovision time delay threshold value that user apparatus service requires, when the reprovision time delay of candidate target cells is less than the reprovision time delay threshold value that user apparatus service requires, further judge whether the average reprovision number of times of candidate target cells is less than average reprovision frequency threshold value, when the average reprovision number of times of candidate target cells is less than average reprovision frequency threshold value, described switch control unit is selected the Target cell of this candidate target cells for switching, target BS under this Target cell sends handover request message, switching with from completing user equipment to Target cell, or

Described switch control unit judges whether the frequency spectrum of candidate target cells is greater than frequency spectrum threshold value effective time effective time, when the frequency spectrum of candidate target cells is greater than frequency spectrum threshold value effective time effective time, further judge whether the reprovision time delay of candidate target cells is less than the reprovision time delay threshold value that user apparatus service requires, when the reprovision time delay of candidate target cells is less than the reprovision time delay threshold value that user apparatus service requires, further judge whether the average reprovision number of times of candidate target cells is less than average reprovision frequency threshold value, when the average reprovision number of times of candidate target cells is less than average reprovision frequency threshold value, described switch control unit is selected the Target cell of this candidate target cells for switching, target BS under this Target cell sends handover request message, switching with from completing user equipment to Target cell.

For solving the problems of the technologies described above, the present invention also provides the switching control in a kind of cognitive radio system, is positioned at base station, comprises source base station processing module and target base station processes module, wherein:

Described source base station processing module, when being source base station in described base station, receives the measurement report that subscriber equipment sends, and according to described measurement report, wireless resource management information, determines Target cell, to target BS, sends handover request message;

Described target base station processes module, when being target BS in described base station, after receiving described handover request message, carries out switching controls according to the reprovision relevant information of described Target cell to described subscriber equipment.

Further, described target base station processes module is carried out switching controls according to the reprovision relevant information of described Target cell to described subscriber equipment, comprising:

Described target base station processes module judges whether the frequency spectrum of described Target cell is greater than frequency spectrum threshold value effective time effective time, when the frequency spectrum of described Target cell is greater than frequency spectrum threshold value effective time effective time, described subscriber equipment is received to control, the switching with completing user equipment to Target cell; Or

Described target base station processes module judges whether the reprovision time delay of described Target cell is less than the reprovision time delay threshold value that user apparatus service requires, when the reprovision time delay of described Target cell is less than the reprovision time delay threshold value that user apparatus service requires, described subscriber equipment is received to control, the switching with completing user equipment to Target cell; Or

Described target base station processes module judges whether the average reprovision number of times of described Target cell is less than average reprovision frequency threshold value, when the average reprovision number of times of described Target cell is less than average reprovision frequency threshold value, described subscriber equipment is received to control, the switching with completing user equipment to Target cell; Or

Described target base station processes module judges whether the frequency spectrum of described Target cell is greater than frequency spectrum threshold value effective time effective time, when the frequency spectrum of described Target cell is greater than frequency spectrum threshold value effective time effective time, further judge whether the reprovision time delay of described Target cell is less than the reprovision time delay threshold value that user apparatus service requires, when the reprovision time delay of described Target cell is less than the reprovision time delay threshold value that user apparatus service requires, described subscriber equipment is received to control, the switching with completing user equipment to Target cell; Or

Described target base station processes module judges whether the frequency spectrum of described Target cell is greater than frequency spectrum threshold value effective time effective time, when the frequency spectrum of described Target cell is greater than frequency spectrum threshold value effective time effective time, further judge whether the average reprovision number of times of described Target cell is less than average reprovision frequency threshold value, when the average reprovision number of times of described Target cell is less than average reprovision frequency threshold value, described subscriber equipment is received to control, the switching with completing user equipment to Target cell; Or

Described target base station processes module judges whether the reprovision time delay of described Target cell is less than the reprovision time delay threshold value that user apparatus service requires, when the reprovision time delay of described Target cell is less than the reprovision time delay threshold value that user apparatus service requires, further judge whether the average reprovision number of times of described Target cell is less than average reprovision frequency threshold value, when the average reprovision number of times of described Target cell is less than average reprovision frequency threshold value, described subscriber equipment is received to control, the switching with completing user equipment to Target cell; Or

Described target base station processes module judges whether the frequency spectrum of described Target cell is greater than frequency spectrum threshold value effective time effective time, when the frequency spectrum of described Target cell is greater than frequency spectrum threshold value effective time effective time, further judge whether the reprovision time delay of described Target cell is less than the reprovision time delay threshold value that user apparatus service requires, when the reprovision time delay of described Target cell is less than the reprovision time delay threshold value that user apparatus service requires, further judge whether the average reprovision number of times of described Target cell is less than average reprovision frequency threshold value, when the average reprovision number of times of described Target cell is less than average reprovision frequency threshold value, described subscriber equipment is received to control, switching with from completing user equipment to Target cell.

Adopt present techniques scheme, cell switch process to subscriber equipment is controlled, can subscriber equipment be switched to suitable Target cell as far as possible, specifically solved in UE handoff procedure the problem that the handoff failure that frequency spectrum resource reprovision causes occurs due to Target cell, and UE is switched to behind Target cell because UE service disconnection and the frequent switching problem that frequency spectrum resource reprovision causes occurs in Target cell.

Accompanying drawing explanation

Accompanying drawing described herein is used to provide a further understanding of the present invention, forms the application's a part, and schematic description and description of the present invention is used for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:

Fig. 1 is the method flow diagram that the embodiment of the present invention 1 source base station is realized switching controls;

Fig. 2 is the embodiment of the present invention 1 switching control structural representation;

Fig. 3 is the method flow diagram that the embodiment of the present invention 2 target BS are realized switching controls;

Fig. 4 is the embodiment of the present invention 2 switching control structural representations;

Fig. 5 is that application example 1 source eNB of the present invention realizes the schematic flow sheet of method for handover control effective time according to the frequency spectrum of Target cell;

To be application example 2 source eNB of the present invention realize the schematic flow sheet of switching controls according to the frequency spectrum effective time of Target cell and reprovision time delay to Fig. 6;

Fig. 7 is that application example 3 source eNB of the present invention realize the schematic flow sheet of switching controls according to the equal reprovision number of times of frequency spectrum peace effective time of Target cell;

Fig. 8 is that application example 4 source eNB of the present invention realize the schematic flow sheet of switching controls according to the frequency spectrum effective time of Target cell, the equal reprovision number of times of reprovision time delay peace;

Fig. 9 is that application example 5 target eNB of the present invention realize the schematic flow sheet of switching controls effective time according to the frequency spectrum of Target cell;

To be application example 6 target eNB of the present invention realize the schematic flow sheet of the preferred embodiment six of method for handover control according to the frequency spectrum effective time of Target cell and reprovision time delay to Figure 10;

Figure 11 is that application example 7 target eNB of the present invention realize the schematic flow sheet of switching controls according to the equal reprovision number of times of frequency spectrum peace effective time of Target cell;

Figure 12 is that application example 8 target eNB of the present invention realize the schematic flow sheet of switching controls according to the frequency spectrum effective time of Target cell, the equal reprovision number of times of reprovision time delay peace.

Embodiment

For making the object, technical solutions and advantages of the present invention clearer, hereinafter in connection with accompanying drawing, embodiments of the invention are elaborated.It should be noted that, in the situation that not conflicting, the embodiment in the application and the feature in embodiment be combination in any mutually.

Embodiment 1

The present embodiment is described the method for handover control of being realized by source base station, and flow process as shown in Figure 1, specifically comprises:

Step 101, source base station receives the measurement report that subscriber equipment sends;

Before this, this process also comprises, subscriber equipment is measured according to the measurement configuration of base station (source base station), then according to the measurement result of measuring in configuration, report mode, to base station reporting measurement result, these processes are all prior aries, are not repeated herein.

Step 102, source base station carries out switching controls according to described measurement report, wireless resource management information and reprovision relevant information to subscriber equipment.

Particularly, source base station is determined candidate target cells according to measurement report, wireless resource management information, according to the reprovision relevant information of candidate target cells, this subscriber equipment is carried out to switching controls.

Above-mentioned reprovision relevant information comprises that following content is one or more: frequency spectrum effective time, reprovision time delay, average reprovision number of times; Wherein:

Described frequency spectrum refers to that current area starts to the time span that exits the moment of work at present frequency spectrum from current time effective time; Particularly, exiting the moment of work at present frequency spectrum can be obtained by base station under community when database obtains this frequency spectrum simultaneously, also can be by base station under community according to the sensing results statistical forecast of this frequency spectrum be obtained, in the time of can being also Radio Resource optimization, manager sets;

Described reprovision time delay refers to that current area starts to complete the needed time to reprovision from resource reprovision, and current area completes the time of reprovision process need, can be the statistical value obtaining according to previous reprovision time delay;

Described average reprovision number of times refers to the reprovision number of times in Preset Time section, can obtain according to the statistical law of previous cell re-configuration number of times, the reprovision number of times of for example passing by 24 hours;

According to the difference of reprovision related information content, the switching controls that source base station carries out according to reprovision relevant information is also different, is specifically described below:

Scene 1, reprovision relevant information only comprises that frequency spectrum is during effective time, source base station is according to measurement report, wireless resource management information is determined behind candidate target cells according to prior art, whether the frequency spectrum that judges candidate target cells is greater than frequency spectrum threshold value effective time effective time, when the frequency spectrum of candidate target cells is greater than frequency spectrum threshold value effective time effective time, source base station is selected the Target cell of this candidate target cells for switching, target BS under this Target cell sends handover request message, afterwards according to the flow performing of existing protocol regulation, switching with from completing user equipment to Target cell, by reference spectrum effective time when switching, can guarantee that in process that subscriber equipment switches to Target cell, Target cell reprovision can not occur, and guarantees that subscriber equipment completed switching before the reprovision of Target cell, thereby avoids handoff failure,

Scene 2, time delay when reprovision relevant information only comprises reprovision, source base station is according to measurement report, wireless resource management information is determined behind candidate target cells according to prior art, whether the reprovision time delay that judges candidate target cells is less than the reprovision time delay threshold value that user apparatus service requires, when the reprovision time delay of candidate target cells is less than the reprovision time delay threshold value that user apparatus service requires, source base station is selected the Target cell of this candidate target cells for switching, target BS under this Target cell sends handover request message, afterwards according to the flow performing of existing protocol regulation, switching with from completing user equipment to Target cell, by when switching with reference to reprovision time delay, can guarantee that subscriber equipment is switched to behind Target cell, the reprovision time delay of Target cell can not cause user apparatus service to interrupt,

Scene 3, when reprovision relevant information only comprises average reprovision number of times, source base station is according to measurement report, wireless resource management information is determined behind candidate target cells according to prior art, whether the average reprovision number of times that judges candidate target cells is less than average reprovision frequency threshold value, when the average reprovision number of times of candidate target cells is less than average reprovision frequency threshold value, source base station is selected the Target cell of this candidate target cells for switching, target BS under this Target cell sends handover request message, afterwards according to the flow performing of existing protocol regulation, switching with from completing user equipment to Target cell, by the average reprovision number of times of reference when switching, can guarantee that subscriber equipment is switched to behind Target cell, the switching frequency of subscriber equipment (reprovision frequency) can be too not high, reduces switching frequency,

Scene 4, time delay when reprovision relevant information comprises frequency spectrum effective time and reprovision, source base station is according to measurement report, wireless resource management information is determined behind candidate target cells according to prior art, whether the frequency spectrum that judges candidate target cells is greater than frequency spectrum threshold value effective time effective time, when the frequency spectrum of candidate target cells is greater than frequency spectrum threshold value effective time effective time, further judge whether the reprovision time delay of candidate target cells is less than the reprovision time delay threshold value that user apparatus service requires, when the reprovision time delay of candidate target cells is less than the reprovision time delay threshold value that user apparatus service requires, source base station is selected the Target cell of this candidate target cells for switching, target BS under this Target cell sends handover request message, afterwards according to the flow performing of existing protocol regulation, switching with from completing user equipment to Target cell,

Scene 5, when reprovision relevant information comprises the equal reprovision number of times of frequency spectrum peace effective time, source base station is according to measurement report, wireless resource management information is determined behind candidate target cells according to prior art, whether the frequency spectrum that judges candidate target cells is greater than frequency spectrum threshold value effective time effective time, when the frequency spectrum of candidate target cells is greater than frequency spectrum threshold value effective time effective time, further judge whether the average reprovision number of times of candidate target cells is less than average reprovision frequency threshold value, when the average reprovision number of times of candidate target cells is less than average reprovision frequency threshold value, source base station is selected the Target cell of this candidate target cells for switching, target BS under this Target cell sends handover request message, afterwards according to the flow performing of existing protocol regulation, switching with from completing user equipment to Target cell,

Scene 6, when reprovision relevant information comprises the equal reprovision number of times of reprovision time delay peace, source base station is according to measurement report, wireless resource management information is determined behind candidate target cells according to prior art, whether the reprovision time delay that judges candidate target cells is less than the reprovision time delay threshold value that user apparatus service requires, when the reprovision time delay of candidate target cells is less than the reprovision time delay threshold value that user apparatus service requires, further judge whether the average reprovision number of times of candidate target cells is less than average reprovision frequency threshold value, when the average reprovision number of times of candidate target cells is less than average reprovision frequency threshold value, source base station is selected the Target cell of this candidate target cells for switching, target BS under this Target cell sends handover request message, afterwards according to the flow performing of existing protocol regulation, switching with from completing user equipment to Target cell,

Scene 7, reprovision relevant information comprises frequency spectrum effective time, during the equal reprovision number of times of reprovision time delay peace, source base station is according to measurement report, wireless resource management information is determined behind candidate target cells according to prior art, whether the frequency spectrum that judges candidate target cells is greater than frequency spectrum threshold value effective time effective time, when the frequency spectrum of candidate target cells is greater than frequency spectrum threshold value effective time effective time, further, source base station judges whether the reprovision time delay of candidate target cells is less than the reprovision time delay threshold value that user apparatus service requires, when the reprovision time delay of candidate target cells is less than the reprovision time delay threshold value that user apparatus service requires, further, source base station judges whether the average reprovision number of times of candidate target cells is less than average reprovision frequency threshold value, when the average reprovision number of times of candidate target cells is less than average reprovision frequency threshold value, source base station is selected the Target cell of this candidate target cells for switching, target BS under this Target cell sends handover request message, afterwards according to the flow performing of existing protocol regulation, switching with from completing user equipment to Target cell.

The content of above-mentioned handover request message, form are all continuing to use of prior art, repeat no more herein.

The reprovision relevant information of candidate target cells can be obtained from base station under candidate target cells by source base station.In addition, if source base station can obtain the reprovision relevant information of candidate target cells from the neighboring BS information list of self maintained, source base station just needn't obtain these information from the base station under candidate target cells.

Above-mentioned frequency spectrum threshold value effective time, reprovision time delay threshold value and average reprovision frequency threshold value can be changed and set in advance according to the actual conditions of network or managerial demand; The selection of reprovision time delay threshold value is relevant with the ongoing business of subscriber equipment in addition, and for example subscriber equipment is carrying out speech business, and reprovision time delay threshold value can be selected 100 milliseconds; Subscriber equipment is carrying out real-time game, and reprovision time delay threshold value can be selected 50 milliseconds.

Realize the switching control that is positioned at source base station of said method, as shown in Figure 2, comprise receiver module 201 and switching controls module 202, wherein:

Receiver module 201, the measurement report sending for receiving subscriber equipment;

Switching controls module 202, for carrying out switching controls according to this measurement report, wireless resource management information and reprovision relevant information to this subscriber equipment.

In a preferred embodiment, this switching controls module comprises candidate target cells determining unit 2021 and switch control unit 2022, wherein:

This candidate target cells determining unit, for determining candidate target cells according to this measurement report, wireless resource management information;

This switch control unit, carries out switching controls for the reprovision relevant information according to candidate target cells to this subscriber equipment.

Switch control unit, repeats no more referring to above-mentioned scene 1-scene 7 the concrete switching controls content of subscriber equipment herein.

Embodiment 2

The present embodiment is described the method for handover control of being realized by target BS, and flow process as shown in Figure 3, specifically comprises:

Step 301, source base station receives the measurement report that subscriber equipment sends;

Step 302, source base station is determined Target cell according to described measurement report and wireless resource management information, to target BS, sends handover request message;

Step 303, target BS is received after described handover request message, according to the reprovision relevant information of Target cell, this subscriber equipment is carried out to switching controls.

The content that above-mentioned reprovision relevant information comprises is referring to describing in embodiment 1.

According to the difference of reprovision related information content, the switching controls that target BS carries out according to the reprovision relevant information of Target cell is also different, is specifically described below:

Scene 1, reprovision relevant information only comprises that frequency spectrum is during effective time, target BS is received after the handover request message of source base station, whether the frequency spectrum that judges Target cell is greater than frequency spectrum threshold value effective time effective time, when the frequency spectrum of Target cell is greater than frequency spectrum threshold value effective time effective time, target BS is done to receive according to prior art and is controlled (AC, Admission Control), according to the flow process of existing protocol regulation, complete switching afterwards, final completing user equipment is to the switching of Target cell, when Rule of judgment does not meet, target BS can send to switch to source base station prepares failed message, source base station is received and is switched the flow processing of stipulating according to existing protocol after preparation failed message, by reference spectrum effective time when switching, can guarantee that in process that subscriber equipment switches to Target cell, Target cell reprovision can not occur, and guarantees that subscriber equipment completed switching before the reprovision of Target cell, thereby avoids handoff failure,

Scene 2, time delay when reprovision relevant information only comprises reprovision, target BS is received after the handover request message of source base station, whether the reprovision time delay that judges Target cell is less than the reprovision time delay threshold value that user apparatus service requires, when the reprovision time delay of Target cell is less than the reprovision time delay threshold value that user apparatus service requires, target BS is done to receive according to prior art and is controlled, according to the flow process of existing protocol regulation, complete switching afterwards, final completing user equipment is to the switching of Target cell, when Rule of judgment does not meet, target BS can send to switch to source base station prepares failed message, source base station is received and is switched the flow processing of stipulating according to existing protocol after preparation failed message, by when switching with reference to reprovision time delay, can guarantee that subscriber equipment is switched to behind Target cell, the reprovision time delay of Target cell can not cause user apparatus service to interrupt,

Scene 3, when reprovision relevant information only comprises average reprovision number of times, target BS is received after the handover request message of source base station, whether the average reprovision number of times that judges Target cell is less than average reprovision frequency threshold value, when the average reprovision number of times of Target cell is less than average reprovision frequency threshold value, target BS is done to receive according to prior art and is controlled, according to the flow process of existing protocol regulation, complete switching afterwards, final completing user equipment is to the switching of Target cell, when Rule of judgment does not meet, target BS can send to switch to source base station prepares failed message, source base station is received and is switched the flow processing of stipulating according to existing protocol after preparation failed message, by the average reprovision number of times of reference when switching, can guarantee that subscriber equipment is switched to behind Target cell, the switching frequency of subscriber equipment (reprovision frequency) can be too not high, reduces switching frequency,

Scene 4, time delay when reprovision relevant information comprises frequency spectrum effective time and reprovision, target BS is received after the handover request message of source base station, whether the frequency spectrum that first judges Target cell is greater than frequency spectrum threshold value effective time effective time, when the frequency spectrum of Target cell is greater than frequency spectrum threshold value effective time effective time, further judge whether the reprovision time delay of Target cell is less than the reprovision time delay threshold value that user apparatus service requires, when the reprovision time delay of Target cell is less than the reprovision time delay threshold value that user apparatus service requires, target BS is done to receive according to prior art and is controlled, according to the flow process of existing protocol regulation, complete switching afterwards, final completing user equipment is to the switching of Target cell, when when above-mentioned Rule of judgment, at least one does not meet, target BS can send to switch to source base station prepares failed message, source base station is received and is switched the flow processing of stipulating according to existing protocol after preparation failed message,

Scene 5, when reprovision relevant information comprises the equal reprovision number of times of frequency spectrum peace effective time, target BS is received after the handover request message of source base station, whether the frequency spectrum that first judges Target cell is greater than frequency spectrum threshold value effective time effective time, when the frequency spectrum of Target cell is greater than frequency spectrum threshold value effective time effective time, further judge whether the average reprovision number of times of Target cell is less than average reprovision frequency threshold value, when the average reprovision number of times of Target cell is less than average reprovision frequency threshold value, target BS is done to receive according to prior art and is controlled, according to the flow process of existing protocol regulation, complete switching afterwards, final completing user equipment is to the switching of Target cell, when when above-mentioned Rule of judgment, at least one does not meet, target BS can send to switch to source base station prepares failed message, source base station is received and is switched the flow processing of stipulating according to existing protocol after preparation failed message,

Scene 6, when reprovision relevant information comprises the equal reprovision number of times of reprovision time delay peace, target BS is received after the handover request message of source base station, whether the reprovision time delay that first judges Target cell is less than the reprovision time delay threshold value that user apparatus service requires, when the reprovision time delay of Target cell is less than the reprovision time delay threshold value that user apparatus service requires, further judge whether the average reprovision number of times of Target cell is less than average reprovision frequency threshold value, when the average reprovision number of times of Target cell is less than average reprovision frequency threshold value, target BS is done to receive according to prior art and is controlled, according to the flow process of existing protocol regulation, complete switching afterwards, final completing user equipment is to the switching of Target cell, when when above-mentioned Rule of judgment, at least one does not meet, target BS can send to switch to source base station prepares failed message, source base station is received and is switched the flow processing of stipulating according to existing protocol after preparation failed message,

Scene 7, reprovision relevant information comprises frequency spectrum effective time, during the equal reprovision number of times of reprovision time delay peace, target BS is received after the handover request message of source base station, whether the frequency spectrum that first judges Target cell is greater than frequency spectrum threshold value effective time effective time, when the frequency spectrum of Target cell is greater than frequency spectrum threshold value effective time effective time, further judge whether the reprovision time delay of Target cell is less than the reprovision time delay threshold value that user apparatus service requires, when the reprovision time delay of Target cell is less than the reprovision time delay threshold value that user apparatus service requires, further judge whether the average reprovision number of times of Target cell is less than average reprovision frequency threshold value, when the average reprovision number of times of Target cell is less than average reprovision frequency threshold value, target BS is done to receive according to prior art and is controlled, according to the flow process of existing protocol regulation, complete switching afterwards, final completing user equipment is to the switching of Target cell, when when above-mentioned Rule of judgment, at least one does not meet, target BS can send to switch to source base station prepares failed message, source base station is received and is switched the flow processing of stipulating according to existing protocol after preparation failed message.

The reason that failed message comprises handoff failure is prepared in above-mentioned switching, comprise following any one or a few: Target cell frequency spectrum does not meet effective time, reprovision time delay does not meet, average reprovision number of times does not meet.

Realize the switching control of said method, as shown in Figure 4, be positioned at base station, comprise source base station processing module 401 and target base station processes module 402.This switching control is positioned at base station, when this base station is during as source base station, leading by source base station processing module 401, when this base station is during as target BS, leading by target base station processes module 402, for a base station, it may be simultaneously as source base station and target BS.In figure:

This source base station processing module 401, when being source base station in this base station, receives the measurement report that subscriber equipment sends, and according to described measurement report, wireless resource management information, determines Target cell, to target BS, sends handover request message;

This target base station processes module 402, when being target BS in this base station, after receiving described handover request message, carries out switching controls according to the reprovision relevant information of described Target cell to described subscriber equipment.

The concrete switching controls content of 402 pairs of subscriber equipmenies of target base station processes module, referring to above-mentioned scene 1-scene 7, repeats no more herein.

Below by application example, above-described embodiment method is elaborated, wherein application example 1-4 is the switching controls of being carried out by source base station, the switching controls of application example 4-8 for being carried out by target BS.Following application example only illustrates part scene, and those skilled in the art can derive not the realization of scene for example in conjunction with above-described embodiment and following application example.

In following application example, with LTE system X2 mouth, switch to example and describe specific implementation.Following method for handover control has been continued to use network side eNB in existing LTE system (enhanced Node Base Station) control UE (User Equipment) and has been held auxiliary switching controls structure, and Mobility Management Entity (MME, Mobility Management Entity) does not participate in switching controls and transmission and the path transfer of just responsible user face data stream.

Application example 1

This example is described source eNB and according to the frequency spectrum of Target cell, is realized the flow process of switching controls effective time, as shown in Figure 5, comprises the following steps:

Step 501, UE, according to the measurement triggering condition of stipulating in agreement, complete the measurement of specification signal and send " measurement report " (MEASUREMENT REPORT) to source eNB;

Step 502, source eNB determine candidate target cells according to " measurement report " and RRM (RRM, Radio Resource Management) information;

Here, source base station determines that the process of candidate target cells determines that with source base station in prior art the process of Target cell is identical, is not repeated herein.

Target eNB under step 503, eNBCong candidate target cells, source is obtained the frequency spectrum effective time of candidate target cells;

Particularly, target eNB under eNBXiang candidate target cells, source sends frequency spectrum request message effective time, target eNB under candidate target cells sends frequency spectrum response message effective time to source eNB, the moment of exiting work at present frequency spectrum that its intermediate frequency spectrum response message effective time comprises candidate target cells, source eNB need to calculate according to the moment of exiting work at present frequency spectrum of candidate target cells the frequency spectrum effective time of candidate target cells, being candidate target cells starts to continue to use when exiting its work at present frequency spectrum the time span of work at present frequency spectrum from current time,

What deserves to be explained is, if source eNB can obtain frequency spectrum information effective time of candidate target cells from the neighboring BS information list of self maintained, source eNB just needn't obtain this information from the target eNB under candidate target cells, directly from neighboring BS information list, obtains this information;

Step 504, source eNB carry out switching controls to UE according to the frequency spectrum of candidate target cells effective time;

Frequency spectrum threshold value effective time of take was example as 1 minute, suppose that source eNB determines that according to " measurement report " message, wireless resource management information Cell1 is candidate target cells, be 1.5 minutes TVWS frequency spectrum effective time of the work at present of Cell1, now the frequency spectrum of Cell1 is greater than frequency spectrum threshold value effective time 1 minute effective time, so source eNB selection Cell1 is Target cell;

Step 505, source eNB send handover request to the target eNB under the Target cell of selecting, and carry out afterwards by the switching flow of existing LTE agreement regulation, and final completing user equipment is to the switching of Target cell.

Here, the content of handover request message, form are all continuing to use of prior art, repeat no more herein.

Application example 2

This example is described source eNB and according to the frequency spectrum effective time of Target cell and reprovision time delay, is realized the flow process of switching controls.As shown in Figure 6, comprise the following steps:

Step 601-602 is identical with step 501-502, is not repeated here.

Target eNB under step 603, eNBCong candidate target cells, source is obtained frequency spectrum effective time and the reprovision time delay of candidate target cells;

Particularly, target eNB under eNBXiang candidate target cells, source sends switching control information request message, target eNB under candidate target cells sends switching control information response message to source eNB, the moment of exiting work at present frequency spectrum and reprovision time delay that wherein switching control information response message comprises candidate target cells, source eNB need to calculate according to the moment of exiting work at present frequency spectrum of candidate target cells the frequency spectrum effective time of candidate target cells, being candidate target cells starts to continue to use when exiting its work at present frequency spectrum the time span of work at present frequency spectrum from current time,

What deserves to be explained is, if source eNB can obtain frequency spectrum effective time and the reprovision Delay of candidate target cells from the neighboring BS information list of self maintained, source eNB just needn't obtain this information from the target eNB under candidate target cells, directly from neighboring BS information list, obtains this information;

Step 604, source eNB are according to the frequency spectrum effective time of candidate target cells and reprovision time delay UE being carried out to switching controls;

Take frequency spectrum threshold value effective time and reprovision time delay threshold value is respectively 1 minute and 100 milliseconds (UE is speech business, therefore reprovision time delay threshold value is selected 100 milliseconds) be example, suppose that source eNB is according to " measurement report " message, wireless resource management information determines that Cell1 is candidate target cells, be 1.5 minutes TVWS frequency spectrum effective time of the work at present of Cell1, reprovision time delay is 90 milliseconds, now the frequency spectrum of Cell1 is greater than frequency spectrum threshold value effective time 1 minute effective time, and 90 milliseconds of reprovision time delays are less than 100 milliseconds of reprovision time delay threshold values, therefore source eNB selection Cell1 is Target cell,

Step 605, source eNB send handover request to the target eNB under the Target cell of selecting; By the switching flow of existing LTE agreement regulation, carry out afterwards, final completing user equipment is to the switching of Target cell.

Application example 3

This example is described source eNB and according to the equal reprovision number of times of frequency spectrum peace effective time of Target cell, is realized the flow process of switching controls.As shown in Figure 7, comprise the following steps:

Step 701-702 is identical with step 501-502, is not repeated here.

Target eNB under step 703, eNBCong candidate target cells, source is obtained the equal reprovision number of times of frequency spectrum peace effective time of candidate target cells;

Particularly, target eNB under eNBXiang candidate target cells, source sends switching control information request message, target eNB under candidate target cells sends switching control information response message to source eNB, the moment of exiting work at present frequency spectrum that wherein switching control information response message comprises candidate target cells and average reprovision number of times, source eNB need to calculate according to the moment of exiting work at present frequency spectrum of candidate target cells the frequency spectrum effective time of candidate target cells, being candidate target cells starts to continue to use when exiting its work at present frequency spectrum the time span of work at present frequency spectrum from current time,

What deserves to be explained is, if source eNB can obtain the equal reprovision number of times information of frequency spectrum peace effective time of candidate target cells from the neighboring BS information list of self maintained, source eNB just needn't obtain this information from the target eNB under candidate target cells, directly from neighboring BS information list, obtains this information;

Step 704, source eNB carry out switching controls according to the equal reprovision number of times of frequency spectrum peace effective time of candidate target cells to UE;

It is example that the equal reprovision frequency threshold value of frequency spectrum threshold value effective time peace of take is respectively 1 minute and 0.5 time/hour, suppose that source eNB determines that according to " measurement report " message, wireless resource management information Cell1 is candidate target cells, be 1.5 minutes TVWS frequency spectrum effective time of the work at present of Cell1, average reprovision number of times is 0.2 time/hour, now the frequency spectrum of Cell1 is greater than frequency spectrum threshold value effective time 1 minute effective time, and average reprovision number of times is less than average reprovision frequency threshold value 0.5 time/hour for 0.2 time/hour, so source eNB selection Cell1 is Target cell;

Step 705, source eNB send handover request to the target eNB under the Target cell of selecting; By the switching flow of existing LTE agreement regulation, carry out afterwards, final completing user equipment is to the switching of Target cell.

Application example 4

This example is described source eNB and according to the frequency spectrum effective time of Target cell, the equal reprovision number of times of reprovision time delay peace, is realized the flow process of switching controls.As shown in Figure 8, comprise the following steps:

Step 801-802 is identical with step 501-502, is not repeated here.

Target eNB under step 803, eNBCong candidate target cells, source is obtained frequency spectrum effective time, the equal reprovision number of times of reprovision time delay peace of candidate target cells;

Particularly, target eNB under eNBXiang candidate target cells, source sends switching control information request message, target eNB under candidate target cells sends switching control information response message to source eNB, the moment of exiting work at present frequency spectrum that wherein switching control information response message comprises candidate target cells, reprovision time delay, and average reprovision number of times, source eNB need to calculate according to the moment of exiting work at present frequency spectrum of candidate target cells the frequency spectrum effective time of candidate target cells, being candidate target cells starts to continue to use when exiting its work at present frequency spectrum the time span of work at present frequency spectrum from current time,

What deserves to be explained is, if source eNB can obtain frequency spectrum effective time, the equal reprovision number of times information of reprovision time delay peace of candidate target cells from the neighboring BS information list of self maintained, source eNB just needn't obtain this information from the target eNB under candidate target cells, directly from neighboring BS information list, obtains this information;

Step 804, source eNB carry out switching controls according to the frequency spectrum effective time of candidate target cells, the equal reprovision number of times of reprovision time delay peace to UE;

With frequency spectrum threshold value effective time, reprovision time delay threshold value peace all reprovision frequency threshold value is respectively 1 minute, 100 milliseconds and 0.5 time/hour is example, suppose that source eNB is according to " measurement report " message, wireless resource management information determines that Cell1 is candidate target cells, be 1.5 minutes TVWS frequency spectrum effective time of the work at present of Cell1, reprovision time delay is 90 milliseconds, average reprovision number of times is 0.2 time/hour, reprovision time delay is 90 milliseconds, now the frequency spectrum of Cell1 is greater than frequency spectrum threshold value effective time 1 minute effective time, and 90 milliseconds of reprovision time delays are less than 100 milliseconds of reprovision time delay threshold values, and average reprovision number of times is less than average reprovision frequency threshold value 0.5 time/hour for 0.2 time/hour, therefore source eNB selection Cell1 is Target cell,

Step 805, source eNB send handover request to the target eNB under the Target cell of selecting; By the switching flow of existing LTE agreement regulation, carry out afterwards, final completing user equipment is to the switching of Target cell.

Application example 5

This example is described target eNB and according to the frequency spectrum of Target cell, is realized the flow process of switching controls effective time.As shown in Figure 9, comprise the following steps:

Step 901-902 is identical with step 501-502, is not repeated here.

Target eNB under step 903, eNBXiang Target cell, source sends handover request message;

Wherein, the content of handover request message, form are all continuing to use of prior art, are not repeated herein;

Step 904, target eNB are received after the handover request message of source eNB, according to the frequency spectrum of Target cell, effective time UE are carried out to switching controls;

Frequency spectrum threshold value effective time of take was example as 1 minute, suppose that Cell1 is Target cell, be 1.5 minutes TVWS frequency spectrum effective time of the work at present of Cell1, now the frequency spectrum of Cell1 is greater than frequency spectrum threshold value effective time 1 minute effective time, therefore can guarantee that UE is switched to Target cell in the process of Target cell Cell1 and can carry out frequency spectrum reprovision, can not cause UE handoff failure due to the frequency spectrum reprovision of Target cell;

Step 905, target eNB are done to receive according to prior art and are controlled (AC, Admission Contro1), carry out afterwards by the switching flow of existing LTE agreement regulation, and final completing user equipment is to the switching of Target cell.

Application example 6

This example is described target eNB and according to the frequency spectrum effective time of Target cell and reprovision time delay, is realized the flow process of switching controls.As shown in figure 10, comprise the following steps:

Step 1001-1003 is identical with step 901-903, is not repeated here.

Step 1004, target eNB are received after the handover request message of source eNB, according to the frequency spectrum effective time of Target cell and reprovision time delay UE being carried out to switching controls;

Take frequency spectrum threshold value effective time and reprovision time delay threshold value is respectively 1 minute and 100 milliseconds (UE is speech business, therefore reprovision time delay threshold value is selected 100 milliseconds) be example, suppose that Cell1 is Target cell, be 1.5 minutes TVWS frequency spectrum effective time of the work at present of Cell1, reprovision time delay is 90 milliseconds, now the frequency spectrum of Cell1 is greater than frequency spectrum threshold value effective time 1 minute effective time, and 90 milliseconds of reprovision time delays are less than 100 milliseconds of reprovision time delay threshold values, therefore can guarantee that UE is switched to after the Cell1 of Target cell, can be because of the frequency spectrum reprovision time delay of Target cell not long and cause UE to go offline,

Step 1005, target eNB are done to receive according to prior art and are controlled, and carry out afterwards by the switching flow of existing LTE agreement regulation, and final completing user equipment is to the switching of Target cell.

Application example 7

This example is described target eNB and according to the equal reprovision number of times of frequency spectrum peace effective time of Target cell, is realized the flow process of switching controls.As shown in figure 11, comprise the following steps:

Step 1101-1103 is identical with step 901-903, is not repeated here.

Step 1104, target eNB are received after the handover request message of source eNB, according to the equal reprovision number of times of frequency spectrum peace effective time of Target cell, UE are carried out to switching controls;

It is example that the equal reprovision frequency threshold value of frequency spectrum threshold value effective time peace of take is respectively 1 minute and 0.5 time/hour, suppose that Cell1 is Target cell, be 1.5 minutes TVWS frequency spectrum effective time of the work at present of Cell1, average reprovision number of times is 0.2 time/hour, now the frequency spectrum of Cell1 is greater than frequency spectrum threshold value effective time 1 minute effective time, and average reprovision number of times is less than average reprovision frequency threshold value 0.5 time/hour for 0.2 time/hour, therefore can guarantee that UE is switched to after the Cell1 of Target cell, can not affect because of the frequent reprovision of Target cell UE user and experience;

Step 1105, target eNB are done to receive according to prior art and are controlled, and carry out afterwards by the switching flow of existing LTE agreement regulation, and final completing user equipment is to the switching of Target cell.

Application example 8

This example is described target eNB and according to the frequency spectrum effective time of Target cell, the equal reprovision number of times of reprovision time delay peace, is realized the flow process of switching controls.As shown in figure 12, comprise the following steps:

Step 1201-1203 is identical with step 901-903, is not repeated here.

Step 1204, target eNB are received after the handover request message of source eNB, according to the frequency spectrum effective time of Target cell, the equal reprovision number of times of reprovision time delay peace, UE are carried out to switching controls;

With frequency spectrum threshold value effective time, reprovision time delay threshold value peace all reprovision frequency threshold value is respectively 1 minute, 100 milliseconds and 0.5 time/hour is example, suppose that Cell1 is Target cell, be 1.5 minutes TVWS frequency spectrum effective time of the work at present of Cell1, reprovision time delay is 90 milliseconds, average reprovision number of times is 0.2 time/hour, reprovision time delay is 90 milliseconds, now the frequency spectrum of Cell1 is greater than frequency spectrum threshold value effective time 1 minute effective time, and 90 milliseconds of reprovision time delays are less than 100 milliseconds of reprovision time delay threshold values, and average reprovision number of times is less than average reprovision frequency threshold value 0.5 time/hour for 0.2 time/hour, therefore can guarantee that UE is switched to after the Cell1 of Target cell, can be because of the frequency spectrum reprovision time delay of Target cell not long and cause UE to go offline, also can not affect because of the frequent reprovision of Target cell UE user experiences,

Step 1205, target eNB are done to receive according to prior art and are controlled, and carry out by the switching flow of existing LTE agreement regulation, and final completing user equipment is to the switching of Target cell.

The above, be only preferred embodiment of the present invention, is not intended to limit protection scope of the present invention.

One of ordinary skill in the art will appreciate that all or part of step in said method can come instruction related hardware to complete by program, described program can be stored in computer-readable recording medium, as read-only memory, disk or CD etc.Alternatively, all or part of step of above-described embodiment also can realize with one or more integrated circuits.Correspondingly, each the module/unit in above-described embodiment can adopt the form of hardware to realize, and also can adopt the form of software function module to realize.The present invention is not restricted to the combination of the hardware and software of any particular form.

Certainly; the present invention also can have other various embodiments; in the situation that not deviating from spirit of the present invention and essence thereof; those of ordinary skill in the art are when making according to the present invention various corresponding changes and distortion, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.

Claims

1. the method for handover control in cognitive radio system, comprising:

2. the method for claim 1, is characterized in that,

Described source base station carries out switching controls according to described measurement report, wireless resource management information and reprovision relevant information to described subscriber equipment, comprising:

3. method as claimed in claim 1 or 2, is characterized in that,

Described reprovision relevant information comprises one or more of following content: frequency spectrum effective time, reprovision time delay, average reprovision number of times; Wherein: described frequency spectrum refers to that current area starts to the time span that exits the moment of work at present frequency spectrum from current time effective time; Described reprovision time delay refers to that current area completes the time of reprovision process need; Described average reprovision number of times refers to the reprovision number of times in Preset Time section.

4. method as claimed in claim 3, is characterized in that,

The described reprovision relevant information according to candidate target cells is carried out switching controls to described subscriber equipment, comprising:

5. the method for handover control in cognitive radio system, comprising:

6. method as claimed in claim 5, is characterized in that,

7. method as claimed in claim 6, is characterized in that,

The described reprovision relevant information according to described Target cell is carried out switching controls to described subscriber equipment, comprising:

8. the switching control in cognitive radio system, is positioned at source base station, comprises receiver module, switching controls module, wherein:

9. device as claimed in claim 8, is characterized in that,

Described switching controls module comprises candidate target cells determining unit and switch control unit, wherein:

10. install as claimed in claim 8 or 9, it is characterized in that,

Described reprovision relevant information comprises one or more of following content: frequency spectrum effective time, reprovision time delay, average reprovision number of times; Wherein said frequency spectrum refers to that current area starts to the time span that exits the moment of work at present frequency spectrum from current time effective time; Described reprovision time delay refers to that current area completes the time of reprovision process need; Described average reprovision number of times refers to the reprovision number of times in Preset Time section.

11. devices as claimed in claim 10, is characterized in that,

Described switch control unit carries out switching controls according to the reprovision relevant information of candidate target cells to described subscriber equipment, comprising:

Switching control in 12. 1 kinds of cognitive radio systems, is positioned at base station, comprises source base station processing module and target base station processes module, wherein:

13. devices as claimed in claim 12, is characterized in that,

14. devices as claimed in claim 13, is characterized in that,

Described target base station processes module is carried out switching controls according to the reprovision relevant information of described Target cell to described subscriber equipment, comprising: